Dental bur



FIG. 1 is a top, front and left side isometric view of a dental bur in accordance with the new design;

FIG. 2 is a left side elevational view thereof;

FIG. 3 is a right side elevational view thereof;

FIG. 4 is a front elevational view thereof;

FIG. 5 is a rear elevational view thereof;

FIG. 6 is a top plan view thereof; and,

FIG. 7 is a bottom plan view thereof.

The broken lines shown in FIGS. 1-3 and 5-7 are for the purpose of illustrating portions of the dental bur that form no part of the claimed design. 

CLAIM The ornamental design for a dental bur, as shown and described. 